First kitty won't play as much anymore

My kitten Rocket does not play that much with us anymore since we got our other kitten Mica. They are best friends and play together a lot, but while Mica also plays with us too Rocket does not.

Is this normal? Or is Rocket mad at us?

Mabye Rocket has so much fun with the other kitty, than not he/she isnt as bored and does not need to play with you as often.

I hope thats all it is. But my boyfriend thinks that we are paying more attention to Micaand Rocket is retaliating by being less playful with us. But he still does come to me for affection but not as often as before.
Maybe we are more attentive with mica. She is a balinese and is very vocal and follws me around all the time. She also jumps into my lap on her own, something that Rocket doesn't do.

I posted this same story about my cats in another thread. My kitten used to be very affectionate and all over us whenever we came into his room when he was sick and separated from his momma. But when he got better and they were reunited, he prefers his momma's company to us humans! I think cats can provide more entertainment for each other than humans can, so unless your cat is a real sucker for human snuggles and attention, chances are they will prefer another cat's company.

Sometimes he tries to get away from her. Like yesterday we wanted to let them sleep in our bed and we put him on the bed. He looked comfy and was falling asleep when Mica ran in and jumped on the bed. He got up jumped off the bed and ran away.

Doesn't anyone have any useful advice?